From d4522b8e9854178473adcea0fbb84f23f6e744bd Mon Sep 17 00:00:00 2001 From: Felipe Boeira Date: Tue, 8 Jan 2019 18:39:03 +0100 Subject: Initial commit --- src/examples/sumargv.c | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) create mode 100644 src/examples/sumargv.c (limited to 'src/examples/sumargv.c') diff --git a/src/examples/sumargv.c b/src/examples/sumargv.c new file mode 100644 index 0000000..06962f9 --- /dev/null +++ b/src/examples/sumargv.c @@ -0,0 +1,26 @@ +#include + +int +main (int argc, char **argv) +{ + int i; + int sum = 0; + char* argv_me = "sumargv"; + char* p; + + for (p = argv_me, i = 0; *p; ++p, ++i) + sum += (*p - 'a') * i; + + for (p = argv[0], i = 0; *p; ++p, ++i) + sum -= (*p - 'a') * i; + + /* if program name is correctly set up sum should now be zero */ + + for (i = 1; i < argc; i++) + sum += atoi(argv[i]); + + /* if argv ends correctly with a null pointer this has no effect */ + sum += argv[argc]; + + return sum; +} -- cgit v1.2.1